201020950644 has 24 divisors (see below), whose sum is σ = 469701267840. Its totient is φ = 66913785984.

The previous prime is 201020950643. The next prime is 201020950661. The reversal of 201020950644 is 446059020102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020950643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11640709 + ... + 11657964.

It is an arithmetic number, because the mean of its divisors is an integer number (19570886160).

Almost surely, 2^201020950644 is an apocalyptic number.

It is an amenable number.

201020950644 is an abundant number, since it is smaller than the sum of its proper divisors (268680317196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201020950644 is a wasteful number, since it uses less digits than its factorization.

201020950644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23299399 (or 23299397 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

Adding to 201020950644 its reverse (446059020102), we get a palindrome (647079970746).

The spelling of 201020950644 in words is "two hundred one billion, twenty million, nine hundred fifty thousand, six hundred forty-four".